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Electrical Engineering
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stevenvh's user avatar
stevenvh
  • Member for 13 years, 10 months
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1,803 Answers

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312 votes
Accepted

Why does USB have 4 lines instead of 3?

302 votes
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USART, UART, RS232, USB, SPI, I2C, TTL, etc. what are all of these and how do they relate to each other?

103 votes
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Tradeoffs when considering SPI or I2C?

89 votes
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Do I really need resistors when controlling LEDs with Arduino?

86 votes

What is the difference between \$V_{CC}\$, \$V_{DD}\$, \$V_{EE}\$, \$V_{SS}\$

73 votes
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What's this importance of datasheets?

73 votes
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What is the ppm in the crystal oscillator?

64 votes
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What is the basic difference between AM and FM radio?

64 votes
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Crystals, Oscillators, and Resonators. What the difference?

62 votes

Why exactly can't a single resistor be used for many parallel LEDs?

60 votes
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What's the third wire on a piezo buzzer?

56 votes
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How can I detect a power outage with a microcontroller?

55 votes
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Why are things like RESET/MCLR active low on most ICs?

55 votes

Choosing power supply, how to get the voltage and current ratings?

53 votes

What is the usage of Zero Ohm & MiliOhm Resistor?

52 votes
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How can I use a 12 V input on a digital Arduino pin?

51 votes
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What's so great about ARM?

49 votes
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Why are lightbulbs considered resistive load?

47 votes
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Why V rms instead of V average?

46 votes
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Is a current-limiting resistor required for LEDs if the forward voltage and supply voltage are equal?

46 votes
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What is the practical difference between watts and VA (volt-amps)?

46 votes
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Noise and what does V/√Hz actually mean?

44 votes
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What exactly is a current source?

43 votes
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Why is three-phase offset by 120 degrees?

43 votes
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Correct formula for LED current-limiting resistor?

42 votes
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Least expensive way to boost DC voltage

42 votes
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Just chopped a cable, is red power, black ground?

41 votes
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Is there any reasoning behind component names?

41 votes

What kind of components are black blobs on a PCB?

40 votes
Accepted

How to invert a digital signal

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